♻️ User Management Part1: Add database fields and db functions

[Jasonxia007]

Contains changes only in backend database layer

[codecov]

Codecov Report

❌ Patch coverage is 91.63498% with 22 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
backend/database/invitation_db.py	89.06%	4 Missing and 3 partials ⚠️
backend/database/role_permission_db.py	89.65%	1 Missing and 5 partials ⚠️
backend/database/group_db.py	96.25%	0 Missing and 3 partials ⚠️
backend/database/tenant_config_db.py	25.00%	3 Missing ⚠️
backend/utils/str_utils.py	66.66%	3 Missing ⚠️

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